The one place I've used QR codes successfully is when friends visit and want to use my wireless on their phones. I've got a QR code for the SSID and another fo

The one place I've used QR codes successfully is when friends visit and want to use my wireless on their phones. I've got a QR code for the SSID and another for the password. For laptops, I can hand out a little USB drive with a text file they can open and copy/paste.